[Blackfin][PATCH] Add BF537 stamp board support

1 files changed, 128 insertions, 0 deletions

diff --git a/cpu/bf537/cache.S b/cpu/bf537/cache.S
new file mode 100644
index 0000000..5bda5bf
--- /dev/null
+++ b/cpu/bf537/cache.S
@@ -0,0 +1,128 @@
+#define ASSEMBLY
+#include <asm/linkage.h>
+#include <config.h>
+#include <asm/blackfin.h>
+
+.text
+.align 2
+ENTRY(_blackfin_icache_flush_range)
+	R2 = -32;
+	R2 = R0 & R2;
+	P0 = R2;
+	P1 = R1;
+	CSYNC;
+	1:
+	IFLUSH[P0++];
+	CC = P0 < P1(iu);
+	IF CC JUMP 1b(bp);
+	IFLUSH[P0];
+	SSYNC;
+	RTS;
+
+ENTRY(_blackfin_dcache_flush_range)
+	R2 = -32;
+	R2 = R0 & R2;
+	P0 = R2;
+	P1 = R1;
+	CSYNC;
+1:
+	FLUSH[P0++];
+	CC = P0 < P1(iu);
+	IF CC JUMP 1b(bp);
+	FLUSH[P0];
+	SSYNC;
+	RTS;
+
+ENTRY(_icache_invalidate)
+ENTRY(_invalidate_entire_icache)
+	[--SP] = (R7:5);
+
+	P0.L = (IMEM_CONTROL & 0xFFFF);
+	P0.H = (IMEM_CONTROL >> 16);
+	R7 =[P0];
+
+	/*
+	 * Clear the IMC bit , All valid bits in the instruction
+	 * cache are set to the invalid state
+	 */
+	BITCLR(R7, IMC_P);
+	CLI R6;
+	/* SSYNC required before invalidating cache. */
+	SSYNC;
+	.align 8;
+	[P0] = R7;
+	SSYNC;
+	STI R6;
+
+	/* Configures the instruction cache agian */
+	R6 = (IMC | ENICPLB);
+	R7 = R7 | R6;
+
+	CLI R6;
+	SSYNC;
+	.align 8;
+	[P0] = R7;
+	SSYNC;
+	STI R6;
+
+	(R7:5) =[SP++];
+	RTS;
+
+/*
+ * Invalidate the Entire Data cache by
+ * clearing DMC[1:0] bits
+ */
+ENTRY(_invalidate_entire_dcache)
+ENTRY(_dcache_invalidate)
+	[--SP] = (R7:6);
+
+	P0.L = (DMEM_CONTROL & 0xFFFF);
+	P0.H = (DMEM_CONTROL >> 16);
+	R7 =[P0];
+
+	/*
+	 * Clear the DMC[1:0] bits, All valid bits in the data
+	 * cache are set to the invalid state
+	 */
+	BITCLR(R7, DMC0_P);
+	BITCLR(R7, DMC1_P);
+	CLI R6;
+	SSYNC;
+	.align 8;
+	[P0] = R7;
+	SSYNC;
+	STI R6;
+	/* Configures the data cache again */
+
+	R6 = (ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+	R7 = R7 | R6;
+
+	CLI R6;
+	SSYNC;
+	.align 8;
+	[P0] = R7;
+	SSYNC;
+	STI R6;
+
+	(R7:6) =[SP++];
+	RTS;
+
+ENTRY(_blackfin_dcache_invalidate_range)
+	R2 = -32;
+	R2 = R0 & R2;
+	P0 = R2;
+	P1 = R1;
+	CSYNC;
+1:
+	FLUSHINV[P0++];
+	CC = P0 < P1(iu);
+	IF CC JUMP 1b(bp);
+
+	/*
+	 * If the data crosses a cache line, then we'll be pointing to
+	 * the last cache line, but won't have flushed/invalidated it yet, so do
+	 * one more.
+	 */
+	FLUSHINV[P0];
+	SSYNC;
+	RTS;